Microsoft Windows OS (XP/NT/Vista/Windows 7/8/9/10) Forum

I haven't used my laptop for a few weeks and now when I try to switch it on I get this error:

Windows could not start because the following file is missing or corrupt:

Windows\System32\Config\System

You can attempt to repair this file by starting windows setup using the orginal setup CD-rom. Selet "r" at the first sreen to start repair.

I've booted from Windows CD and had to run a repair overnight, which took about 6 hours! This has not fixed the problem and I still get the same error. I suspect the problem is to do with overheating or possibly the battery not charging correctly. Laptop is a Fujitsu and is about four years old, so it always has to be plugged into the wall.

Looks like I need to try and fix the registry manually. Any suggestion on how to fix this without having to do a clean install? I don't really want to open it up and start messing around with RAM or other hardware. Also don't want to make unnesessary regedit changes.

The reason I suspected the hardware was because the laptop kept shutting down as if it was not getting enough power.

The initial symptoms seemed to indicate that it is hardware related (plus some articles I found online), however I found an article which suggested I should fix the system32 files. The possibility of dealing with two separate issues is there, but from your insightful post it could have absolutely nothing to do with the battery.

Below are Microsoft's suggested commands to type at the recovery console command prompt to fix missing or corrupt system32 files:

I've just tried to repair it again. Booted from Windows CD and pressed "r" to get to the Recovery Console. When one needs to select the Operating System to boot from it only displays C:\Windows as an option and not Windows XP as I would expect. On selecting #1 it takes you to command prompt.

I created the backup files as suggested by MS, and deleted the original system files (which are backed up), but "copy c:\windows\repair\system c:\windows\system32\config\system" gives a "the system cannot find the file specified" error.

I have taken your advice and now selected the first option. I accepted the XP Licensing Agreement.

This takes me to the XP Pro setup window. The only options displayed are:

The following list shows the existing partitions and unpartitioned space on this computer.

To set up Windows XP on the selected item, press ENTER.

To create a partition in the unpartitioned space, press C.

To delete the selected partition, press D.

C: Partition1 D: Partition2

I selected Partition1 and pressed ENTER [Install] to see what the options are.

The following options are displayed

Format the partition using NTFS (Quick)

Format using FAT (Quick)

Format partition using NTFS

Format partition using FAT

Leave the current file system intact (no changes)

So no option to repair. I managed to get into dos prompt and can verify that the data is still in tact. Is there a way I can get this laptop on the network and copy the files across? At this stage I would prefer to do a clean install, assuming I can backup the data first.

You're missing an interim step there. Usually after accepting the license agreement the install process will recognize your existing version of Windows and offer you the option to Repair that install or to continue with a clean install. Is it possible you missed this and continued on to a clean install?

A clean install will require you to reinstall everything. That's probably a lot more work than you need.

That step is not an option, as in it is not displayed on the screen. I am missing my c:\windows\system32\config\default file... which could be the reason it is not picking up the OS.

A clean install will overwrite all data, though?

The first repair was done by a guy from work whilst I wasn't looking. I assume he managed to do the repair you are trying to suggest I do. I only assume it took 6hrs, because after about 3hrs it was about 50-odd percent.

If it's just a matter of that one file/directory missing then try copying those files through the Recovery Console [support.microsoft.com].

I'm not sure why the Repair Install option isn't coming up. There may be more problems lurking.

As you say it is a 4 year old system, and a laptop to boot. Laptops can be more prone to hardware glitches. However, a complete re-format and re-install of Windows can breathe new life into a machine. Sure, it can be a pain to re-install software, but in the end you'll have a clean setup. (That's a good time to take an image backup so that you can revert to the clean install in the future.)